Diallyl maleate as an insecticide



Patented Aug. 3, 1943 airs 1.

N @i@ J DKAILLYL MALEA'E'E AS AN ENSEC'JHIQWE William Moore, Stamford, and Richard G. Robiin,

31"., Old Greenwich, Goran, assiors to American Cyanamid @omp ,1; corporation of Maine New York, N. T1, at

No Drawing. Application August 30, 1941, Serial No. 408,996

2 Claims.

and their eggs, and that such activity is attained without any substantial harmful or detrimental action on the vegetation infested with the insect.

The following example in which the parts are by weight illustrates a specific method of preparing the above compound.

Example A mixture consisting of 98 parts of maleic anhydride, 170 parts of allyl alcohol, 200 parts of ethylene dichloride (solvent), 4 parts oi dcamphor sulfonic acid (catalyst) and 1 part of bronze powder (polymerization inhibitor) was heated azeotropically at about 120 C. for eleven hours in an apparatus provided with means for separating the water formed during the reac= tion. After removing the low boiling materials from the resulting product by evaporation under vacuum, 157 parts of diallyl maleate were obtained as a water-white liquid boiling at 91-92 C. at a pressure of about 1-2 mm. of mercury.

Spray solutions were prepared by dissolving the diallyl maleate in a solvent medium consisting of 65% acetone and 35% water. A. 100% control was obtained when a spray of 1-500 dilu- -tion was used against the citrus red spider,

Tetranychus citri. At the same dilution the insecticide gave an 83.8% control on the bean aphid, Aphis rumicis.

This new insecticide maybe applied in any of the conventional manners. Thus, for example, it may be used in an aqueous emulsion or it may also be incorporated in organic liquids such as the aliphatic and aromatic hydrocarbons for spraying purposes. It may be efiectively used in dusts with such inert diluents as kieselguhr, wood flour, walnut shell, talc and the like.

While the invention has been described with particular reference to specific embodiments, it is I MOORE. P i O. ROBLES, JR. 

